From: Ville Syrjälä <ville.syrj...@linux.intel.com>

BT.2020 specifies two YCbCr<->RGB conversion formulas. The more
traditional non-constant luminance and a more complicate one constant
luminance one. Add an enum value for the constant luminance variant
as well in case someone has hardware supporting it.

Cc: Harry Wentland <harry.wentl...@amd.com>
Cc: Daniel Vetter <dan...@ffwll.ch>
Cc: Daniel Stone <dan...@fooishbar.org>
Cc: Russell King - ARM Linux <li...@armlinux.org.uk>
Cc: Ilia Mirkin <imir...@alum.mit.edu>
Cc: Hans Verkuil <hverk...@xs4all.nl>
CC: Uma Shankar <uma.shan...@intel.com>
Cc: Shashank Sharma <shashank.sha...@intel.com>
Cc: Jyri Sarha <jsa...@ti.com>
Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
---
 drivers/gpu/drm/drm_color_mgmt.c | 1 +
 include/drm/drm_color_mgmt.h     | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_color_mgmt.c b/drivers/gpu/drm/drm_color_mgmt.c
index a84fc861e406..061d342f9d96 100644
--- a/drivers/gpu/drm/drm_color_mgmt.c
+++ b/drivers/gpu/drm/drm_color_mgmt.c
@@ -357,6 +357,7 @@ static const char * const color_encoding_name[] = {
        [DRM_COLOR_YCBCR_BT601] = "ITU-R BT.601 YCbCr",
        [DRM_COLOR_YCBCR_BT709] = "ITU-R BT.709 YCbCr",
        [DRM_COLOR_YCBCR_BT2020] = "ITU-R BT.2020 YCbCr",
+       [DRM_COLOR_YCBCR_BT2020_CONST] = "ITU-R BT.2020 YCbCr constant 
luminance",
 };
 
 static const char * const color_range_name[] = {
diff --git a/include/drm/drm_color_mgmt.h b/include/drm/drm_color_mgmt.h
index b3b6d302ca8c..175943c87d5b 100644
--- a/include/drm/drm_color_mgmt.h
+++ b/include/drm/drm_color_mgmt.h
@@ -41,7 +41,8 @@ int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc,
 enum drm_color_encoding {
        DRM_COLOR_YCBCR_BT601,
        DRM_COLOR_YCBCR_BT709,
-       DRM_COLOR_YCBCR_BT2020,
+       DRM_COLOR_YCBCR_BT2020, /* non-constant luminance */
+       DRM_COLOR_YCBCR_BT2020_CONST, /* constant luminance */
        DRM_COLOR_ENCODING_MAX,
 };
 
-- 
2.13.6

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

Reply via email to